Kai-Chao Yang

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Wireless sensor networks have received considerable attention in recent years due to their invaluable potential applications. To achieve long-term deployment, in-network aggregation has been studied and argued as an effective data reduction technique. In this paper, an efficient algorithm to construct and maintain aggregation architecture in cluster-based(More)
In this paper, we propose a novel coding dependency among video frames which supports efficient error resilience without adding any redundancy. Our approach is based upon reorganizing the regular GOP structure. The proposed scheme can effectively recover a lost frame and prevent the error propagation phenomenon. For a single frame loss, we guarantee that(More)
The coverage problems have been studied in the recent years, most of them with limited detection capability therefore some pivotal sensors consume energy rapidly and there exist a large amount of partially unused sensors when the network lifetime terminated. We introduce an M-M (multiple sensors to multiple targets) probabilistic target coverage problem and(More)
Wireless sensor networks (WSNs) comprise a large number sensor devices with limited power and resource. One of the key design challenges in the sensor networks is to efficiently utilize limited local storage capacity at individual sensor nodes to store historical data and produce fast and approximate responses to user queries. In this article, we propose a(More)